Netflix has cancelled a rash of series of late, including The Get Down, Bloodline, Sense 8 and Marco Polo, among others. CEO Reed Hastings recently warned that there could be more to come, given that being able to decide to cut one’s losses is an important piece of innovation.

Sense8 was created by the Wachowskis, of The Matrix fame, and reportedly cost $99 million per season for its two-season run.
“You should have more things that don’t work out, you have to get more aggressive,” he said, speaking at Recode’s Code Conference earlier this year. “The drive toward conformity as you grow is more substantial. As a leader, you want to drive people to take more risks.”
He spun his comments into a bit of a humblebrag: “Our hit ratio is way too high right now,” he said. “I’m always pushing the content team. We have to take more risk. You have to try more crazy things, because we should have a higher cancel rate overall.”
However, research firm Ampere believes that the recent spate of cancellations is actually linked to efforts to reverse the declining average quality of its titles—to achieve the proverbial quality over quantity.
Since 2015, Netflix's catalogue of Originals has dropped in quality by roughly 4%, as estimated using Ampere's quality measure. The shows which Netflix has cancelled have all fallen below a cost vs interest threshold. Ampere has calculated a simple cost-effectiveness ratio for Netflix Originals (weighing up show cost relative to the volume of quality-weighted IMDB reviews) which illustrates that Netflix's cancelled shows (with the single exception of Bloodline) all fall below the levels of cost-effectiveness achieved by its renewed titles.
On this scale, Stranger Things registers as the most cost-effective series Netflix has released, followed by 13 Reasons Why and Narcos. By contrast, The Get Down achieved middling interest but commanded a high fee, and was the least cost-effective Original, followed by Hemlock Grove.
“Netflix has been placing its bets in a few areas,” the firm said. “By Ampere's estimates, over a third of the company's expenditure on Originals to-date has been for drama titles, and nearly a quarter of the company's Original spend has been on comedy series and stand-up shows. Action and adventure, crime and thrillers, science fiction and horror are also significant areas of investment.”